Skip to main content
Log in

Minc03328 effector gene downregulation severely affects Meloidogyne incognita parasitism in transgenic Arabidopsis thaliana

  • Original Article
  • Published:
Planta Aims and scope Submit manuscript

Abstract

Main conclusion

Minc03328 effector gene downregulation triggered by in planta RNAi strategy strongly reduced plant susceptibility to Meloidogyne incognita and suggests that Minc03328 gene is a promising target for the development of genetically engineered crops to improve plant tolerance to M. incognita.

Abstract

Meloidogyne incognita is the most economically important species of root-knot nematodes (RKN) and causes severe damage to crops worldwide. M. incognita secretes several effector proteins to suppress the host plant defense response, and manipulate the plant cell cycle and other plant processes facilitating its parasitism. Different secreted effector proteins have already been identified in M. incognita, but not all have been characterized or have had the confirmation of their involvement in nematode parasitism in their host plants. Herein, we characterized the Minc03328 (Minc3s00020g01299) effector gene, confirmed its higher expression in the early stages of M. incognita parasitism in plants, as well as the accumulation of the Minc03328 effector protein in subventral glands and its secretion. We also discuss the potential for simultaneous downregulation of its paralogue Minc3s00083g03984 gene. Using the in planta RNA interference strategy, Arabidopsis thaliana plants overexpressing double-stranded RNA (dsRNA) were generated to specifically targeting and downregulating the Minc03328 gene during nematode parasitism. Transgenic Minc03328-dsRNA lines that significantly downregulated Minc03328 gene expression during M. incognita parasitism were significantly less susceptible. The number of galls, egg masses, and [galls/egg masses] ratio were reduced in these transgenic lines by up to 85%, 90%, and 87%, respectively. Transgenic Minc03328-dsRNA lines showed the presence of fewer and smaller galls, indicating that parasitism was hindered. Overall, data herein strongly suggest that Minc03328 effector protein is important for M. incognita parasitism establishment. As well, the in planta Minc03328-dsRNA strategy demonstrated high biotechnological potential for developing crop species that could efficiently control RKN in the field.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Fig. 1
Fig. 2
Fig. 3

Similar content being viewed by others

Abbreviations

DAI:

Days after inoculation

eGFP:

Enhanced green fluorescent protein

pJ2:

Parasitic second-stage juvenile

ppJ2:

Pre-parasitic second-stage juvenile

RKN:

Root-knot nematode

References

Download references

Acknowledgements

The authors are grateful to EMBRAPA, UCB, CNPq, INCT PlantStress Biotech, CAPES, and FAP-DF for the scientific and financial support.

Funding

This work was supported by grants from INCT PlantStress Biotech, UCB, CNPq, CAPES, FAP-DF, INRAE, and EMBRAPA. MFB is grateful to CNPq for a postdoctoral research fellowship (PDJ 150936/2018-4). MFGS is grateful to CAPES/Cofecub project for financial support in the researcher and students’ exchange program between institutions.

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Maria Fatima Grossi-de-Sa.

Ethics declarations

Conflict of interest

The authors declare no conflict of interest.

Additional information

Communicated by Dorothea Bartels.

Publisher's Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Supplementary Information

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Moreira, V.J.V., Lourenço-Tessutti, I.T., Basso, M.F. et al. Minc03328 effector gene downregulation severely affects Meloidogyne incognita parasitism in transgenic Arabidopsis thaliana. Planta 255, 44 (2022). https://doi.org/10.1007/s00425-022-03823-4

Download citation

  • Received:

  • Accepted:

  • Published:

  • DOI: https://doi.org/10.1007/s00425-022-03823-4

Keywords

Navigation